Rock Tumbling: mahogany obsidian in lortone and lot-o from start to finish polish
29:35
Rock Tumbling: blue tigers eye from start to finish in lortone and lot-o tumblers
30:59
How to Tumble Obsidian
31:45
Rock Tumbling: Bahia agates from medium to polish in the Lot-o tumbler.
9:03
Making a Knapped Stone Spear Head From Mahogany Obsidian
17:20
Unexpected Beauty: Tumbling Basalt and 'Mistaken' Obsidian!
6:48
Cutting Mahogany Obsidian 
22:53
How to Tumble Obsidian in a Rotary Rock Tumbler! A Step-by-Step Guide from Start to Finish!
39:46